A woman’s arm was severed by a motorboat propeller in a Saturday night pleasure cruise gone horribly wrong.

The Coast Guard responded to a distress call from the “Naut Guilty” about 7:45 p.m. for a report of a person who fell overboard and lost an arm. Responders put a tourniquet on the injured arm and took the woman to Boston Fire Department’s Marine 1 and rushed her ashore to Massachusetts General Hospital.

The operator of the 29-foot “Naut Guilty”, Benjamin Urbelis, 33, of Charlestown, was arrested by Massachusetts Environmental Police and was charged with operating a boat under the influence of alcohol.

The 19-year-old woman fell overboard near Spectacle Island. There were 13 people on board the boat at the time of the incident.

According to the Herald, the passengers, sporting bikinis and swim trunks, were questioned on the docks in Charlestown. Some left the scene sobbing. Police said that several passengers leapt overboard to help the young woman